diff -uNr geant4.9.3.ORIG/config/sys/Darwin-g++.gmk geant4.9.3/config/sys/Darwin-g++.gmk
--- geant4.9.3.ORIG/config/sys/Darwin-g++.gmk	2009-12-19 02:23:02.000000000 +0900
+++ geant4.9.3/config/sys/Darwin-g++.gmk	2010-03-08 15:17:45.000000000 +0900
@@ -35,10 +35,16 @@
     FCFLAGS   += -O2 -g
     CCFLAGS   += -O2 -g
   endif
-  FC := gfortran
-  FCFLAGS += -fno-automatic -fno-backslash -fno-second-underscore
+  ifeq ($(shell which gfortran 2>&1 | grep -c 'no gfortran'),0)
+    FC := gfortran
+    FCFLAGS += -fno-automatic -fno-backslash -fno-second-underscore
+    FCLIBS := -lgfortran -lgfortranbegin -lnsl
+  else
+    FC := g77
+    FCFLAGS += -fno-automatic -fno-backslash -fno-second-underscore
+    FCLIBS := -lg2c -lnsl
+  endif
   LDFLAGS += -bind_at_load -arch_multiple
-  FCLIBS := -lg2c -lnsl
   SHEXT   := dylib
   ifndef X11FLAGS
     X11FLAGS  := -I/usr/include/X11/extensions -I/usr/include/X11
diff -uNr geant4.9.3.ORIG/source/global/management/src/G4PhysicsFreeVector.cc geant4.9.3/source/global/management/src/G4PhysicsFreeVector.cc
--- geant4.9.3.ORIG/source/global/management/src/G4PhysicsFreeVector.cc	2009-12-19 02:24:34.000000000 +0900
+++ geant4.9.3/source/global/management/src/G4PhysicsFreeVector.cc	2010-03-08 15:13:27.000000000 +0900
@@ -45,7 +45,7 @@
 //--------------------------------------------------------------------
 
 #include "G4PhysicsFreeVector.hh"
-
+#include <climits>
 
 G4PhysicsFreeVector::G4PhysicsFreeVector() 
   : G4PhysicsVector()
diff -uNr geant4.9.3.ORIG/source/global/management/src/G4PhysicsLinearVector.cc geant4.9.3/source/global/management/src/G4PhysicsLinearVector.cc
--- geant4.9.3.ORIG/source/global/management/src/G4PhysicsLinearVector.cc	2009-12-19 02:24:34.000000000 +0900
+++ geant4.9.3/source/global/management/src/G4PhysicsLinearVector.cc	2010-03-08 15:13:27.000000000 +0900
@@ -39,6 +39,7 @@
 //--------------------------------------------------------------------
 
 #include "G4PhysicsLinearVector.hh"
+#include <climits>
 
 G4PhysicsLinearVector::G4PhysicsLinearVector()
   : G4PhysicsVector(), dBin(0.), baseBin(0.)
diff -uNr geant4.9.3.ORIG/source/global/management/src/G4PhysicsLnVector.cc geant4.9.3/source/global/management/src/G4PhysicsLnVector.cc
--- geant4.9.3.ORIG/source/global/management/src/G4PhysicsLnVector.cc	2009-12-19 02:24:34.000000000 +0900
+++ geant4.9.3/source/global/management/src/G4PhysicsLnVector.cc	2010-03-08 15:13:27.000000000 +0900
@@ -39,6 +39,7 @@
 // --------------------------------------------------------------
 
 #include "G4PhysicsLnVector.hh"
+#include <climits>
 
 G4PhysicsLnVector::G4PhysicsLnVector()
   : G4PhysicsVector(), dBin(0.), baseBin(0.)
diff -uNr geant4.9.3.ORIG/source/global/management/src/G4PhysicsLogVector.cc geant4.9.3/source/global/management/src/G4PhysicsLogVector.cc
--- geant4.9.3.ORIG/source/global/management/src/G4PhysicsLogVector.cc	2009-12-19 02:24:34.000000000 +0900
+++ geant4.9.3/source/global/management/src/G4PhysicsLogVector.cc	2010-03-08 15:13:27.000000000 +0900
@@ -46,6 +46,7 @@
 // --------------------------------------------------------------
 
 #include "G4PhysicsLogVector.hh"
+#include <climits>
 
 G4PhysicsLogVector::G4PhysicsLogVector()
   : G4PhysicsVector(), dBin(0.), baseBin(0.)
diff -uNr geant4.9.3.ORIG/source/global/management/src/G4PhysicsOrderedFreeVector.cc geant4.9.3/source/global/management/src/G4PhysicsOrderedFreeVector.cc
--- geant4.9.3.ORIG/source/global/management/src/G4PhysicsOrderedFreeVector.cc	2009-12-19 02:24:34.000000000 +0900
+++ geant4.9.3/source/global/management/src/G4PhysicsOrderedFreeVector.cc	2010-03-08 15:13:27.000000000 +0900
@@ -50,6 +50,7 @@
 ////////////////////////////////////////////////////////////////////////
 
 #include "G4PhysicsOrderedFreeVector.hh"
+#include <climits>
 
 /////////////////////////
 // Class Implementation
diff -uNr geant4.9.3.ORIG/source/graphics_reps/src/HepPolyhedron.cc geant4.9.3/source/graphics_reps/src/HepPolyhedron.cc
--- geant4.9.3.ORIG/source/graphics_reps/src/HepPolyhedron.cc	2009-12-19 02:24:34.000000000 +0900
+++ geant4.9.3/source/graphics_reps/src/HepPolyhedron.cc	2010-03-08 15:13:27.000000000 +0900
@@ -67,6 +67,7 @@
 
 #include <cstdlib>  // Required on some compilers for std::abs(int) ...
 #include <cmath>
+#include <cstdlib>
 
 using namespace HepGeom;
 using CLHEP::perMillion;
diff -uNr geant4.9.3.ORIG/source/processes/hadronic/models/neutron_hp/src/G4NeutronHPInelasticBaseFS.cc geant4.9.3/source/processes/hadronic/models/neutron_hp/src/G4NeutronHPInelasticBaseFS.cc
--- geant4.9.3.ORIG/source/processes/hadronic/models/neutron_hp/src/G4NeutronHPInelasticBaseFS.cc	2009-12-19 02:25:16.000000000 +0900
+++ geant4.9.3/source/processes/hadronic/models/neutron_hp/src/G4NeutronHPInelasticBaseFS.cc	2010-03-08 15:13:27.000000000 +0900
@@ -38,6 +38,7 @@
 #include "G4Alpha.hh"
 #include "G4Electron.hh"
 #include "G4NeutronHPDataUsed.hh"
+#include <climits>
 
 #include "G4ParticleTable.hh"
 
diff -uNr geant4.9.3.ORIG/source/processes/management/src/G4ProcessManager.cc geant4.9.3/source/processes/management/src/G4ProcessManager.cc
--- geant4.9.3.ORIG/source/processes/management/src/G4ProcessManager.cc	2009-12-19 02:25:22.000000000 +0900
+++ geant4.9.3/source/processes/management/src/G4ProcessManager.cc	2010-03-08 15:13:27.000000000 +0900
@@ -48,6 +48,7 @@
 #include <iomanip>
 #include "G4ProcessTable.hh"
 #include "G4ios.hh"
+#include <climits>
 
 
 // ---------------------------------